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TDS Meter - Tester. The Only Way To Know If Your Reverse Osmosis RO Membrane Is Performing Correctly - Tests for TDS - Total Dissolved Solids. A Must For All RO System Owners. Compare Incoming Feed Water To Treated Water - Replace Membrane If Less Than 80% of TDS Is Being Removed - Total dissolved solids (TDS) are the total weight of all solids (minerals, salts or metals) that are dissolved in a given volume of water expressed in milligrams per liter (mg/L), or in parts per million (PPM). The lower the TDS level in the water, the more efficiently your body's cells actually get hydrated by the water that you drink. The higher the TDS levels in the water, the greater the probability of harmful contaminants that can pose health risks or hinder the absorption of water molecules on the cellular level. 17 PPM of TDS = 1 grain of hardness. Highly efficient and accurate due to its advanced microprocessor technology.
Hold Function: saves measurements for convenient reading and recording.
Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries.
Measurement Range: 0-9990ppm. From 0-999ppm, the resolution is in increments of 1ppm. From 1,000 to 9,990ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image.
Display: large and easy-to-read LCD screen.
Factory Calibrated: recalibration is not necessary, but can be done easily with a watch screwdriver. There's no need for messy solutions to initially calibrate the meter.
Range: 0 - 9990ppm (mg/L)
Accuracy: +/- 2%
ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to 122 degrees Fahrenheit)
Power source: 2 x 1.5V button cell batteries (included)
Battery life: over 1,000 hours of continuous use
Dimensions: 14 x 2.3 x 1.5cm (5.5 x .9 x .55 inches)
Weight: 32g (1.13 oz) Simple to use for Reverse Osmosis membrane monitoring. Measure the incoming water and the RO water. Divide the larger number into the smaller number and subtract that decimal from 1. The resulting decimal is the percent of TDS that the membrane is removing.
We really like this tester and think that anyone who wants to know about the quality of their water should have one of these TDS Meter Testers.

TDS Meter - Dual Mode - Installs Inline - Check the TDS level with the push of a button. Now you can easily check to make sure the water from your reverse osmosis system is top quality. Measure the tap water coming in vs. the purified water going out of your system at any time. Very easy installation. Simply cut the line out from the RO membrane housing and install the inline probe between the membrane housing and the shutoff valve, when possible. The closer to the membrane housing the better. Insert the ends of the tube into the John Guest quick connectors on the TDS meter probe. Then cut the inlet feed water line to the system and install the other T/probe. FEATURES
Displays TDS levels of the feed water and product water with in & out electrode probes.
Highly efficient and accurate due to its advanced microprocessor technology.
Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use.
Dual Range 0-9990 ppm (From 0 - 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image.)
Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.
Comes equipped with John Guest Quick-Connect T-fittings as shown.
Installs quickly and easily.
SPECIFICATIONS
Range: 0-9990 ppm
Accuracy: ±2%
Cable Length: 24.5" (including sensor)
Power source: 2 x 1.5V button cell batteries (included)
Battery life: over 1000 hours of continuous use
Size: 7.6 x 2 x 4.7 cm (3 x .8 x 1.9 in.)
Weight: 79.4 g (2.8 oz.)
Always know if your RO membrane is performing correctly!

Dow Corning/Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - 6 gram pillow pack. (like a ketchup packet) Great O-ring sealant and lubricant. FDA and NSF approved. (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Housings) This is the same premium grade silicone sealant and lubricant used in underwater photography cameras, scuba gear and other underwater applications that simply can't afford leaks. Why not use the best for your reverse osmosis or drinking water filtration system?

Save a flood inside the house. Prevent costly water damage. Automatically shut off the water to leaking Reverse Osmosis Systems, Water Coolers, Refrigerators, Ice Makers and Coffee Machines. Alarm flashes and beeps to notify you to the system shut down. Very simple to install and use. Brilliant design. Simply place the sensor (Similar in size to a small computer mouse) where water will collect below the system. Cut the incoming 1/4" or 3/8" water tube and insert each end into the quick connectors on the controller. When the sensor gets wet it shuts off the incoming water at the controller. Reset the sensor by wiping it dry. # AS-414 with 4 1/2' cord that connects the sensor. The Leak Controller is a great way to control costly leaks.

Pro Products Sani System Sanitizer. 0.25 or 0.5 fl. oz. concentrate. Sani-System ®
Pro Products is proud to introduce Sani-System, the first and only EPA product approved for sanitizing water softeners, RO units and Water Coolers. Sani System is proven to kill 99.9% of E. coli, E. coli O157:H7, Staphylococcus aureus, Listeria monocytogenes and other harmful bacteria. It does not use chlorine, other oxidizers or acids that can harm water softener equipment parts. Use is simple; each dose comes in a pre-measured pouch. Just cut, pour and regenerate softener. No measuring, No mess! Sanitizing Equipment! Applications
Interior Surfaces of Water Softeners, Reverse Osmosis (RO) Units, Ice Machines, Water Coolers, Water Holding Tanks and Pressure Tanks. Sani-System is now NSF certified!
Directions for Use
It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.
Sanitization of Interior Surfaces of Water Softeners and Reverse Osmosis (RO) Units.
Water Softeners
Sanitization should occur after initial installation, after the system is serviced and periodically during its use.
Backwash the softener and add 1 ounce of sanitizer per 8 gallons of water (200 ppm active quaternary) to the brine tank well. (NOTE: standard systems capacity is 48 gallons,) (The brine tank should have water in it to permit the solution to be carried into the softener.)
Proceed with the normal regeneration or interrupt the cycle after the brining step and let the softener soak for a minimum of 60 seconds.
Backwash the softener with potable water to make sure all sanitizing solution is thoroughly rinsed from the unit before returning it to service.
Reverse Osmosis (RO) Units
Sanitization should occur after initial installation, after the system is serviced and periodically during its use.
Turn off RO system, drain storage tank and remove membrane element and pre-filters. Put membrane element in a plastic bag so it remains wet.
Fill empty pre-filter housing with 1 ounce of sanitizer per 8 gallons of water (200 ppm active sanitizer) and turn on raw water. (NOTE: standard system capacity is 2-3 gallons)
After holding tank is full, let system stand idle for a minimum of 60 seconds. Turn off water. Drain holding tank.
Before the system is put back into service, flush system with potable water to assure sanitizing solution is rinsed thoroughly form system. Follow the manufacturer’s directions for re-installation of new per-filters, membrane elements and post filter, membrane element and post filter.
Sanitation of interior surfaces of Ice Machines, Water Coolers, Water holding tanks and Pressure tanks, Ice Machines
Sanitization should occur after initial installation, after the machine is serviced and periodically during its use.
Shut off incoming water line to machine.
Prepare a solution of 1 oz. of sanitizer per 8 gallons of water (200 ppm active quaternary)
Circulate solution through machine making user to wet all surfaces and allow a minimum contact of 60 seconds.
Drain and completely flush system twice with portable water.
Storage and disposal
DO NOT CONTAMINATE WATER, FOOD OR FEED BY STORAGE OR DISPOSAL - Store in a dry place no lower in temperature then 50 degrees F or higher than 120 degrees F.
Shipping information
Non-hazardous.
This is the best sanitizing solution available anywhere! Stock up and save.

* American Plumber ® is the registered trademark of
American Plumber, the manufacturer of American Plumber ® brand water treatment equipment. The replacement filters and
membranes listed above are not manufactured or endorsed by American Plumber.
Rather, these filters and membranes are manufactured by other companies.
While these filters and membranes are compatible for use in American Plumber ® brand water treatment equipment, we make no representation as
to whether using these filters and membranes is consistent with the warranty and
specifications applicable to American Plumber ®
equipment.